Those resistors are standard resistors of Non Inflammable type and can be found where electronic parts are sold. NIR stands for N= Non, I= Inflammable, R= Resistor. Resistor R88 is 560 ohms and not as you wrote 56 ohms.

: Need resistors for driver board (R88)56 ohm 1/3 w NIR and (R92) 47 1/2 w NIR. Any help where i can pick these resistors up at would be appreciated.